Oh wow this article was written specifically for me! :) My mom has been known for decades for her brownies, which she openly tells people are box brownies—Betty Crocker specifically, in fact—but people still love them. She noticed, a long time ago now (ten years?), that the recipe on the new boxes had changed, but since she still had a few of the old boxes, did some measuring and experimenting (and calls to the company) and found that a) the mix itself hadn't changed, just the amount of it, and thus that b) if you bought multiple boxes and kept a jar to "save the rest" you could measure out one "old box equivalent" of brownie mix and make it according to the old recipe and it would come out just like before.
So now we really do have a "secret recipe", that's just the old box instructions. Since the first time it happened we've noticed the box change several times (and the article above acknowledges this with an "(again)") but from what I can tell the powder itself is still the same stuff, it's just a different amount each time.
So now we really do have a "secret recipe", that's just the old box instructions. Since the first time it happened we've noticed the box change several times (and the article above acknowledges this with an "(again)") but from what I can tell the powder itself is still the same stuff, it's just a different amount each time.